Cut-off machine



lung 18, 1935. N c. RUBIN CUT-OFF MACHINE 6 Sheets-Sheet Filed May 27, 1933 INWENTOR NORBERT c. euam BY MW ATTORNEY 8 av v 3 June 18, 1935. c RUBIN 2,005,052

CUT-OFF MACHINE Filed May 27, 1933 6 Sheets-Shgec June 18, 1935; N. c. RUBIN CUT-OFF MACHINE Filed May 27, 1953 6 Sheets-Sheet INVENTOR NORBERT c. R

UBIN

OZ 4 4' p w I ATTORNEY Q June 18, 1935.

N. c. RUBIN 2,005,052

CUT-OFF MACHINE Filed May 27, 1953 -6 Sheets-Sheet 5 I'll H8 1 i' I5 lze INVENTOR i q I 4 BY NORBERT c. RUBIN 5 i-Afiiffi Fi ed May '7, 9 5 6 Sheets-Sheet 5 m w me In E B R O N "w F1? d m g g 4 I Patented June 18, 1935 UNITED STATES CUT-OFF onmn v Norbert C. Rubin, Cleveland, Ohio, assignor to The McKinney Tool'and Manufacturing Company, Cleveland, Ohio, acorporation of Ohio Application :May 2'7, 1933, Serial No.- 673,133

My invention relates to cut-off mechanisms and more in particular to a high speed saw cut-'ofi.

' The present method or cutting off relatively wide sections of material isto place'the material beneath a driven saw whichismounted'on the end of a beam hung from the ceiling of the room and manually draw the saw through the'material. Sometimes this beam is hung from a bracket formed onthe saw bed. An object of my invention is to provide a saw mechanism which supports a saw above the material to be cut off and which, at the will of the operator, lowers the saw into working engagement with the, material, forces the saw laterally through the material, then raises the saw' out of working engagement with the material and returns'the sawt'o its-elevated initial position. I

. If such a saw were attached to the end of a roll forming machine to 'cut ofi pieces of the sections rolled therein, it would be desirable to vary the speed of travel of the saw throughthematerial". Itis obvious to all who are familiar with the-art that various thicknesses and types of materialrequire various speeds of travel of the saw through the material to obtain greater length of life-for the saw blade. Therefore I provide an adjustable drive for the mechanismwhich drives the saw through the material and thereby form' another object of my invention. i i v A desirableapplication for a cut-01f machine such as Ihave described in my first object is to have it located between the end of acoldroll forming machine and-a run-out table'pr ovided to support the portion of the formed material projecting from the roll forming machine. As another object of my invention, I provide atrigger adjustably mounted in the path of the mate rial on the run-out table so that as the material contacts the trigger, the movementimpartedto said trigger actuates a control which stops the roll forming machine and arrests the travel of the material being formed thereimat which timethe operator operates the saw and cuts'off a desired length of the formed material. 1 While employing the sawin thisfmanner the I operator may find that the lengths- 'of theimaterial being cut off are not as accurate asd'esired. To correct this condition I mount the saw in an adjustable relationship with the trigger on the run-out table and by means of an indicator, a reasonable tolerance can be maintained inthe lengths of the material .beingcut-off. This forms another object'of my invention.

Further objects and advantages of my invention will-be apparent from the following detailed de scription and illustrations in which;

1 Figured is a plan view of a roll forming machine with its motor, its clutch and transmission, the saw and its controls and the run-out table and 5 its'a'ssociated trigger;

Figure 2 is a partial sectional view across the line 2 '2' Figure 1;

Figure 3 is a partial elevational view taken along the line 3- 3 Figure 1;

Figure 4 is a front elevational view of the cutofisaw showing a portion of the roll forming machine and a portionof the run-out table;

Figure5 is apartialsectional view of the cranks and linkage arrangement showing the saw in a different operative position from that shown in i s; I I

Figure6 is a partial sectional view taken across theline" 6-45 Figure 4;

Figure? is'a-rear elevational View showing a portion of the saw operating mechanism; 1 Figure 8 is a partial view taken along the line 8-2 Figure'mf- Figure" 9 is fa partial sectional view along the line 99 Figured; 25 t Figure *l0 is' an'end view of the run-out table showing the trigger mounting; 1

Figure 11"is a partial view of the trigger and run-out table; 7 v "Figure 12 is a partial elevational view of the run-out table showing the trigger and rod mountm r" Figure 13 is a partial elevational view of the trigger rodmounting on the run-out table and the limit switch with its control;

Figure 14 is apartial sectional view taken along the line I4-i4 Figure 4;

Figure 15 is an electrical circuit diagram showing the method of wiring the roll forming and cut-ofi*machines with their respective controls. 40

In the accompanying drawings which serve to illustrate my invention, the reference character 20, (see Figures 1, 2 and 3) designates the bed of a:rollforming machine. Mounted thereon and adjacent'to each other are a series of rear housings 2|; carrying internally for rotation a worm 22. Fixed to the extreme ends of each worm shaft 22,- isa coupling 23 also keyed to the end of the adjacent worm shaft. Meshing with the worm 22, is a worm gear 24, keyed to the bottom spindle-25, whichis also mounted for rotation in the rear housing'2 l. Keyed to the bottom spindle 25, between theworm gear 24 and the front wall of the rear housing 2|, is a spur gear 26, having engagedwith'it in driven relation, another spur and a belt sheave 41, mounted on theshaft-o:

gear 21, fixed to the top spindle 28. Projecting from the rear housing 2|, the bottom spindle 25 terminates in a bearing in the outboard housing 29. Adjacent the spur gear 21, the top spindle 28 iscarried for rotation in the bearing box 30, slidably mounted in ways in the rear housing 2|. Extending through the bearing box 30, the top spindle 28, also terminates in another bearing box 3|, slidably mounted in the outboard housing 20. Located in a top plate 32, which is suitably fastened to the rear housing 2 I, is a screw 33, having threaded engagement therein and extending downwardly to contact and locate the box 33. Another top plate 34, which is suitably fastened to the outboard housl'n'g fl fllob a screw 35, having threadedfeng'aifihrxitfirfiehl and extending downwardly'to contact mandate the bearing box 3 I. It is now apparent that when the worm 22 is rotated, the worm gear 24, and its associated bottom spindle 25 also rotates and throughthe mediumof the spur 3681's ,36 and :21, the top spindle 28 rotates. It is also evident that if rolls were placed and keyed on the top and hotto rn-s 'pindlesand were .rotated in the direction designated by the arrows 3,6, material interposed between said rolls would be driven in-the direction designated by thearrow '3 I.

Adjacent to the first rear housing2 |-,'is located a sprocket housing 38,. supporting for rotation a shaft 39 having keyed thereon a sprocket 40. Engagin the end of theshaft am nd the adjacent Worm shaft 22, is a;coupling-'23. A chain belt 43!, carried at one end thesprocket 40, is supported at its other end by another sprocket, which is keyed to a shaft 43. Supporting the shaft 3 ar We. p o blo ks. 1 thr ws.

of which, the shaft 43 extends andterminates in the driven half-015 a magnetic'clutch For purposes of illustration I show the driven 11ml! of theclutch 45, its associated collector rin 46,

electric motor 48, althou-gh-an ordinarycounter shaft could be used to replace themotor shaft, saidcountershaft being engaged with allnc Shaft by means of a coupling or a. beltdrilla; connects ing the belt sheave. 41,-

another belt flheive 49, which is keyed to the shaft of a direct current generator 563, is a belt 5|. it is ap arent that as the shaft of the motor 48, is when; sheave 41, and the drivers-half of vthe clutch 45, with its associated collector rings (,jfllflo rotate, By virtue of the belt 5|, imparting rotationto the belt sheave 49, thearmature ofthegmtor 5|], rotates and generates the required amount of direct current.

I do not further describe the 81.60- trieal wiring, relation between the generator 750 and the magnetic clutch- 45, as it is very evident to all who are familiar with thisart. It isnlso obvious that 'as the magnetic clutch 45, is, mgaged, by means of an electriealoontrol contained in the switch box 52, rotation of the motor shaft is imparted to the shaft 43 and item!- ated. sprocket 12. Likewise the sprocket '40, is rotated by virtue of. the chain 4|. As hes-embeisrotated and rotate Located at the exit end ofthe roll forming machine is ahigh speed cut-off saw, (seeFigures '1, 4, 5, 6, and 7) comprising a bed 53, and a sawearriage 54. The saw blade 55, is located between two clamping washers 56, on theshaft ot an elece trical motor 51, and retained thereon bya nut 53, having threaded engagement with the of the motor shaft. Supporting the motor 51, in a plate on aomnk 68, formed on the crankshaft 69.

62, havingformed thereon, and extending rearwardly, a bifurcated lever 59, mounted intermediate its ends on a pin 60, which is carried in the upper end of another bifurcated lever 6|, located in the bifurcation formed in the lever 59. The

opposite end of the bifurcated lever 59, carries both ends of a pin 63, the center of which bears in one end of alever 64. Supporting the lower end of the lever 5|, is a pin 65, having'one of its ends fixed in a bracket 36, and its other end fixed in another bracket 61. Lever 64, extending down- Wardly from the pin 63, terminates in a bearing Another crank 10, formed on the crankshaft 69, suitably one end of a lever 1|, having its op- ?oslte end mounted on the center of a. pin l2, bcated intermediate the ends of, and in the bitux-cation formed in, the lever 6|, which carries both ends of the pin 12. The brackets 66 and 51, located on either side of the cranks 68 and 10, also serve to support the cranksha'ft .69, which extendlng beyond the bracket 61:, has formed thereon a flange 13-, Continuing beyond the flange 13, the crankshaft 39, extends through a spur gear 14, a washer 15, and .terminatesin a-threaded which en ages anut 76, to retain the spur gear and washer thereon, said. spur-gear being mounted thereon for rotation. Upon rotating the crankshaft. one revolution, beginm'ng from aw oximatelythe position shown in Figure .6 the electrieal motor, 51, and its. associated saw blade 55, are first lowered for a. distance, then moved outwardly, then upwardly and retunied'in an arcuate manner to the initial position. 'By way of illustrationI-have shown in Figure 6, a. relatively wide section of formed shieetmetaI-H, in: position to be cut off by the saw 55. It is obvious that the saw blade 56, in performing the working cycle Just described, is lowered into cutting engage+ ment with the stock J'L'then forced outwardly through the stock, then. retrieved from'the stock nd returned to its initial position... This arrange; ment and links-and the motion resulting from the rotation therein is more fully-deiscribed and illustrated in my co-pending patent a cation Serial No. 666,337.) ,Slidably mounted ingthe flange 13, on thecranksh'aft 59,;isa:block 78, Figures .8. and 9) one end 'of whichhasa hole drilled therein, against the bottom ofwhi'ch rests one end of a compression spring 19, having its opposite end bearing against, a provided wall in the fl n e 13. The block 18 normallytlo outed in the flange I 13, in such a manner that: its opposite end is flush with the face of theflange 13. In this manner it is retainedby. a. blade 80,

: from the face of the flange 13. The .pin 3!, has

a shoulderformed inits outward end facinga Similar shoulder formed on the end of the pin82, except that the face formed bythe shoulder on the pin 32 is bi-sected, by the end of said pin tapering inwardly from itsj'outward extremity. It is apparent that when the blade 80, is removed from its associated groove in thebljock 18, the block 13' is moved towards the gear 14, by virtue of the compression spring 19, behind the block, where it is engaged by the shoulderson the pins 3|, and 32, looking the flange 13 with thegear 1|. Itlsth'eh Obvious that, with the block n 'in this position, when the gear 14 rotates, the flange 13 and the crankshaft 33 likewise rotate. F

in driving relation with Extending rearwardly. from the block .18, the blade 88, terminates in a hole formed in. a bracket 83,;which is suitably fastened to the bracket. 61.

Formed in the endof the blade 88, is-an elongated .hole through which is passed a pin 84 having both bearing against the under side of the blade 88.

Formed in the opposite end'of the plunger 88 is a hole, against the end of which bears a compression spring 89 having itsopposite end located .againsta plug 98 which has threaded engagement with the lug 81. Thus it is evident that by virtue of the compression spring 89 bearing against the plug98, the plunger 88 is forced upwardly against the blade 88. Therefore, as the blade 88 is pivoted about the pin 84, its opposite end is brought to bear against the flange I3, thus locating the sliding block 18in its previously described with-. drawn position.

Formed on-the underside of the blade 88, ad-

'jacent the plunger 88, is a lug, having fixed therein and extending .on either side thereof, a pin 9|.

Located .on either side of said lug and mounted on the ends of the pin 9I are the ends of a pairof links 92, the opposite ends of which are carried on the ends of another pin 93- fixed in, and intermediate the ends of, another lever '94.. Adjacent the pin 93, the lever 94 terminates around apin 95 upon which it is carried for rocking movement. The opposite end of thelever 94 terminates in a clevised portion and has fixed therein both ends of apin 96,the center of which supportsone end of a link 91, having its opposite endmounted around a pin 98 which is fixed in the bifurcated upper endof a plunger 99 of an associated ordinary electrical solenoid I88. It is now apparent that the spring 89 and plunger 88 serve. to maintain theupward positions of the blade 88, the links 92, 94 and 9'I, and the plunger 99. Therefore, as'the solenoid I88 is energized, its associated plunger 99-is drawn downwardly and by'virtue of the links 91, 94 and 92, the blade 88 is also drawn downwardly and out of engagement with the sliding block I8, allowing it to be pushed forward by the compression spring 19.. Likewise then, it is also apparent that as the gear I4, with its component pins 8I and 82, is rotated in the direction designated by the arrow I8I (Figures 8 and 9) the sliding block 18 engages the first pair of pins, BI and, with which it comes in contact, and rotation-is imparted to" the crankshaft 89 and its associated cranks 38 and I8, resulting in the previously described, desired operating movement of the motor 51 .and its associated saw blade 55.-

Meshing with the gear 14, is an idler gear I82, supported for rotation by the bracket I83 which is suitably fastened to the carriage54." Engaging the idler gear I82, is a I fixed to the out-put shaft of a speed reducer I85, the input shaft of which is coupled to the shaft of an electrical motor I88.- It is evident that as the motor I88 is rotated, the gear 14 also rotates by virtue of the speed reducer I85 and the gears I84 and I82. While I have illustrated a gear train, a speed reducer and an electrical'motor to rotate the gear 14, I wish it understood that this arrangement is merely. il-

pinion I84,

port the said second member.

lustrative of a typical embodiment of my invention and not by way of limitation or narrowing of the appended claims.

I also wish it understood that I have contemplated the replacement. of the illustrated speed lr reducer I85 with a variable speed reducer, the utilization of which obviates the abilityto vary the speed of the saw through the stock.

r Beneath the saw carriage 54,and fixed to the top of thesaw bed 53, is a pair of ways I81, having mounted for reciprocation therein a pair of gibs I88,

53, is a bracket I89, extending upwardly from the bed and having fixed on its top surface, a rack I I8, which is meshed with a pinion I I I. Adjacent the pinion II I, and extending downwardly from the saw carriage 54, is a lug IIZ, 'supporting for rotation, one end of a shaft 3', to

which the pinion I II is keyed; Extending out.-

wardly, the shaft II3 passes through a boss in the carriage 54 and immediately terminates in the hub of a handwheel I I4, to which it is keyed. It is now obvious that as the handwheel II4:-is rotated, the carriage 54 reciprocates by medium of the pinion III meshing with the rack H8.

The purpose of this reciprocating means" will be more fully hereinafter described.

Fixed to the end of the saw bed 53,

and 12) comprising a frame of conventional structural iron work welded together with a flat,

tabular surface extending the full length and width of the structure. Fixed on the rearward side of the table II5, is a plurality of brackets IIE, extending to oneside, and above the surface, of the table. Suitably fastened to the top of the inner surface of thebrackets II6,'is a -track I I1, having mounted thereon a-trigger carriage H8, comprising two pairs of rollers III! which are supported by pins fixed in a member III of the trigger carriage which extends in a parallel relation to the table H5 and trackilI'l. Extending over the table top II5, and perpendicular to said member of the trigger carriage H8, is a second member I12 having located at its outer end a roller I28, suitably mounted there'- on and provided to roll on said table top and sup- Extending downwardly and on the rearward side of the table II5, the first mentioned member III of the trigger carriage II8 terminates in a split block I2I, through which passes 'a trigger rod I22, clamped in the split block by screws, (not shown) said trigger rod being located in a parallel relation I2I is also carried along with the carriage H8.

Projecting from either end of the split block I2I, one end of the trigger rod I22 terminates at the far end ofthe run-out table II5, while the op-' posite end passes through a block I23, a spring I24, a tube I25, and terminates in one end of a square rod I28, wherein it is fixed. (Figures 4, 12, 13, and 14). The tube I25, which is fixed to the end oi'the run-out table II5, extends forwardly over the saw carriage 54, and terminates in a portion containing a square bearing through which passes the square rod I26. Extending be'- yond the tube I25, the square rod I26 terminates in a round portion upon which is fixed a pointer I21 extending upwardly from the rod. Bearing against the opposite end of the square rod I26,

is one end of 'a run out table I I5, (see Figures 1,4, 10, 11,

which'are suitably fastened to the'saw carriage 54. Alsofixed to the top of the saw bed .wardly from the block I23 and which terminates in the bearing in the tube 125, and has fixed therein the end of the trigger rod I22, is one end of the compression spring I24, the opposite end of which bears against a cap I28 located at the opposite end of the tube I and having threaded engagement thereon. [Adjacent to the cap I28, is the block I23 which is fixed t0 the trigger rod. I22 and slides against a bearing stripI29 fixed to the run-out table II5 immediately above the block I23. Extending downformed thereon is a pair of lugs I30 carrying both ends of a pin I3I upon the center of which'is mounted for rocking movement a latch I32. Extending downwardly from the pin I 3| the latch I32 terminates in an angular cam face, while, extending outwardly from the pin the latch terminates in a portion bearing against the underside of the block I 23, :said portion-serves to retain the latch I32 in the proper position asgravity afiects the cam portion of the latch. Also mounted on the run-out table 5, with its operating roller I33 in co-acting relation with the cam face of the latch I32, is a normally closedlimit switch I34, connected in series with the circuit controlling the magnetic clutch 45. The wiring of said switch will be hereinafter disclosed. .It is now obvious that as the trigger rod I22 ismo-ved in the direction designated by the arrow I35, Figs. 4 and 13, the block I23 with its associated latch I32 likewise move in the same direction and actuate or open the normally closed limit switch I34. Ina similar manner the spring I24 is compressed and the .square rod I26 with its associated pointer I21 also move in the same-direction. Partiallyshown covering the crank and link mechanism, (Figures 4 and -6) is a guard I36, serving to house said mechanism. Mounted on the guard -I36, and in coacting relation with the pointer I21, is an indicator I31.

It is now apparent that as a section of stock formed in the roll forming machine advances from the machine and passes beneath the saw I .55 it continues to travel upon the run-out table H5, until it contacts the trigger member I12, which is pushed along by the stock. Immediately upon moving the trigger. carriage II 8 and its associated rod I22, thelimit switch I34 is actuated which causes the magneticclutch 4 5 to be disengaged, and the arrest of the travel of the stock-through the roll forming machine. Also, the pointer I21, is moved in the direction of travel of the stock, until such movement is stopped, at which time the operator aligns the pointer I21 and the indicator I31 by employing the handwheel II4 with its associated rack and pinion. The saw is now in position to cut oil the stock. This isdone byactuating or depressing av normally open push button type switch I38, mounted in a tower I39 formed on the carriage 54, said switch energizing the previously mentioned solenoid I00 which trips the clutch and rotates the crankshaft 53, resulting in the desired operating movement of the saw 55. Upon removing the severed pieceof stock from the run-out table, it is evident that the spring I24 will return the trigger H8 and the pointer I21 to their initial positions. Obviously, as this operation is repeated, the lengths of stock cut off do not vary and a very close tolerance is maintained. After the present piece of stock has been cut off, the roll forming machine may berestarted by depressing the normally open push button type switch I 43, located in the switch box :52 which is mounted on .abracket I suitably fastened to the bed 24 of roll forming machineIsaid switch being in series with the magnetic clutch circuit, which is more fully hereinafter described. located in the switch box 52 is a normally closed push button type switch 142 which serves to disengage the magnetic clutch and stop the roll torming machine. A third push button switch I43 of the normally closed type, also located inthe switch box52, is utilized as an inch control 101' the roll forming machine and is advantageous for making adjustments-in the machine.

In Fig. 15, which represents a circuit diagram for the roll forming machine and its respective controls, I designate the conductors coming from a conventional sourceof alternating current by the numerals I44 and. I45. Connecting one pole of the electrical motor 48 to the conductor 4, is another conductor I46, and the other pole of the motor is connected to the conductor 5 by another conductor I41. Although I have not shown a motorstarter, I wish it understood that a. conventional starting arrangement may-be employed to start themotor 48. Also located in the machine, though not previously described, is a contact I48, containing an electrical control apparatus which comprises "a magnetic coil I49,

is g

a core I58, a normally open contact I51, another normally-open contact I52 and a, normally closed contact I53. Connecting one pole .of the generator 50 and one contact on the'magn'etic I49, is a conductor I54, and another conductor I55 connects the other contact. on thecoii 1 to one contact of the push button switch I41]. Extending from the other pole of the {generator 5i), is a conductor I56 which terminates in a spliced engagement with another conductor I51, having its one end fastened to .one terminal :of thecontact I5I and its, opposite end is secured to one contactof the normally closed limit switch I 34. Another conductor I58 connects the opp! site contact of the switch; I34 to one contact o! the push button switch I42, the opposite contact of which is connected to one. of theinormally closedterminals of the four contact push button switch I43 by a conductor I 59. The some terminal of the switch I43 is connected. to it's co-acting normally open contact by a, conductor I-Iiihsaid contact beingalso connected to one terminal of the push button switch I by another conductor {I6I. Extending from the op.- posite normally closed contact of the switch I43 is a conductor I62, the .opposite ,end of which is secured to a terminal of the contact 2. Connecting the opposite normally open content of the switch I43 and the other contact of the switch I40, is a conductor I63. Extending from the opposite-terminal of the contact .I5I is :a conductor I64, the opposite end of which contacts one of-the collector rings '46 of the mag.- netic clutch 45, the other collector ring of said magnetic clutch .being connected to the conductor I54 by another conductor I65. Another conductor I 66, having its onev end secured other terminal of the contact I52, terminates its opposite end in a spliced engagement with the conductor I55. Connecting one terminal oiithe contact 453 and one pole of the solenoid coil I. is a conductor I61, and the other pole of said solenoid coil is connected to the alternating current supply conductor I44 by another eon opposite end secured to one contact of the norm ly wen pushbutton switch I28, the

tor50, through the conductors I56 and I51, the

limit switch I34, the conductor I58, the. normally closed switch I42, the conductors I59, I60 and I6 I,

, the 'now closed switch I40, the conductor I55, the

magnetic'coil I49, and returns to'the generator through the conductor .I54. As the.:magnetic coil I49-is energized, its. associated core I50 is drawn downward which causes the normally open contacts I! and I52 to be'closed and the normally closed contact. I53 to be opened. With the contactI-52 closedydirect current again flows from the generator through the conductors I 56'and I51, the limit switch I34, the conductor. I58, the switch I42, the conductor I59, the switch I43, the conductorv I62, the now closed contact I52, the conductors I56 and I55, the. magnetic coil I49, and

, returns to the'generatorthrough the conductor I54.. .Thus it. issobvious that the push button switch I 40 maybe released immediately after being depressed'and that a circuit will be maintained, causing the magnetic coil I49 to be energized and its componentcore and contacts to be actuated. As the. contact I5I' is closed, direct current flows from the generator 50 through the conductors I55 and I51, the now closed contact I5I, the conductor I64, the coil of themagnetic clutch 45, causing it to be energized and to engage the clutch, 'andreturns to the generator. through the conductors I05 and I54. It is apparentthat as thepush button switch I42 is depressed, opening its contacts, the circuit between the generator and the magnetieycoil, I49 is broken and the contacts,I 5I and I52 are "reopened, causing the coil of the magnetic clutch .45, to be de-energized which releases or disengages the clutch. Obviously, as the push button switch I43'isdepressed,

a circuit will be made, causing the magnetic clutch to be energized, but only as long as the said push button is depressed. Immediately upon its release the circuit is brokenwhich obviateslthe release oi, the magnetic clutch. It is also evident that actuation of the normally closed limit switch I34, tends to open any previously'made circuit.

As the push button switch I38 is depressed, al

ternating currentflows from the main line I45,

through the conductor I10, the switch I38, the conductor I69, the normally closed contact I53, the conductor I6'I,..the magnetic coil I00, causing its associated plunger 99 .to be drawn downward, and returns through the conductor I68 to the oppositemain linej'l44y1 It is apparent that the opening of the normally closed contact I53 causes the magnetic coil I09 to be inoperative. Throughout the description of the electrical circuit I have specified types of switches, controls and current, and I wish it understood that these are merely certain embodiments of my invention and that the mere substitution of these items will not involve any departure from this disclosure.

Although I have herein specified the direction of rotation of the saw driving mechanism and the direction of travel of the saw through its movement, I wish it understood that this was merely for purposes of illustration and that it is obvious that the direction of the said rotation and travel ciated driving members, suchuvariations ,being contemplated .by me. and not involvingany de parture from the scope-of my'invention.

I wish it: known andeunde'rstood that'the par ticular mechanism and the various parts thereof illustrated and described are merely atypical embodiment of my. invention and thattthe specific construction I described I herein is merely by way of illustration and not. by limitation or narrowing of myclaims. Obviously various of the features described can be omitted leaving the mechanism stillxoperative to do certain of its work, such changes being. contemplated by me and not involvin'gany. departure from my-inventionz. 1 Havingthus described my inventiongwhat I claimasnew and desire. to secure by Letters Pat entis:- 1

1. Acut-o'ff .machine comprising a table, a cutting element-.movablyt. mounted thereon, means tov move the element .in one transverse. direction across the table, while in operating relation the're-' to andtoreturn the. elementthrough a reverse transverse. direction in an elevated position, the

said means. comprising. .-a crankshaft havinga plurality of differently relatedlcranks, and link} age connecting the'crankswith the cutting 'ele ment. I v

2. A cut-off machine comprisinga table, a rotary cutting elementmovably mounted thereon,

couldbereversed without a'variation iofthe assosaid element having "a dwell position, the dwell position: having elevated relation to the table, meanstomove theielement inone transverse di rection acrossthe tablewhile' in operating rela-, tion'thereto and to return the element througha reversetransversedirection in an elevated positiongthesaid means actingon the element to accelerate it fromandfdecelerate it to the said dwellpositionui I tingv element 'movably mounted' thereon, means to move the element 'one transverse direction across the table while in operating relation thereto and to return the element through a reverse transverse directioniin an elevated position, said means comprising a crankshafthaving a 'pair of differently related cranks, and linkage connecting the cranks to the cutting element.

'4; A cut-off machine 'comprising a table, a rotary cutting element movably mounted thereon, means tomove the said element downwardythen transversely across the table, then upward'and back to its originalposition, said means comprising a crankshaft having a plurality of differently related cranks, andnlinkage connecting the cranks to the cutting element. 1 5. A cut-off'machine comprising a table-a rotary cutting element movably mounted thereon, means to move the-saidelement in onetransverse direction across the table and to return the element to its initial position through a reverse transverse direction, the said means comprising a crankshaft having a plurality of differently related cranks, and linkage connecting the cranks to the cutting element.

6. A cut-off machine comprising a table, a rotary cutting element movably mounted thereon, means to move the element in one transverse direction across the table while in operating relation thereto and to return the element through a reverse transverse direction in an elevated position, said means comprising a crankshaft having a plurality of differently related cranks, and linkage connecting the cranksto the cutting element,

..,40-, 3.;A cut-off machine comprisinga table; a cut-" I assoureerdfimotive.rpower.,raiohrtdrmuomw to the cutting element.

:9. In a mechanism mat the reins 11 in combination, :a. 1:011 ziumnirzgzznmiue, 5 a but-rofi machine locatedain upmartingimlsmon'ztofrme'rrdfl forming wmachine, L'the icutsofl izmazchme -rconrprising asupporntarmittingialementmvably mount- :ed thereon, meamssto'm've filament-said means cOmpri'sihga-xcrankfihafltfhwvsingiaqmiwlm tyr'of differentfl'y'remtodzcrmksgmiiltnkngeircom necti-ng fthe eranksi to meiircuizfingxelemmt; and a, run-out table located in operating 'relatidn to the cuteofi machine. t J

.10. ;A cutaoif t-mazchineino Emma crankshaft roiatabziy fmounoe'd mm crainksharfthavingmcpinmlibyi of nmkssamiwotably mounted-member, a'flinkmnnectingimlezuf dae T prankstoa .pivot mtemmdmite rthe :emis m1 Jth'e said pivotsbiy "mounted member, as. beam'ipixzotably mounted intifls ieruis mn ithe ,endnof the :sa-idmi'votablymoimted memberpasec on'd link connectingtotmiemui :of the beam, and a cutting element Dosite emd'ofwtheihcam. 5

11. A -.cut-offimachmez no E ma member pivotobly :Imimteii iiihmanpra beam mounted on the said mm,:mcirtflmg ilemmt mounted on "one :aend wot :the xcmnmhaft rotatabiy moimtedon the ammonia, :mpimwhryacf cranks onthe crankshaft, aalinkmnnnctingsm of the "cranks wto .adid :m', with raimcbnd link connectingziaznothcr'zcrm no the maid 12. In 1m mechanism at the'rciass idescnibed; in combination, ra. Emil machine, in cent-m machine :IQCB/ifi'd rim ae'latinnrto forming Jmachme, the cut-uh machine :nemm-iss,'- suppont; zn:mmhcr g mummu thereon, a lbeam mounted rthe'xmiii-mmber, a :zcutting aelemient mmitefl ion me end nf the beam, at crankshattzmtabahiy mounted on the support, a pluraili-ty 'o'f cranks- 'on the crank'shef t, a link connecting one of the cmriks to the said member, and a second wonnect-ing another cnankgto the said f-beam,:ra:nd a mouted Chine.

operating "relation to "the sout-edfi 1m- 13-. 1 A cut-ofi nmchine "comprising mm,

cutting element movabiy mounted :flmreun,

meansit'o move the element, sa-idmeazns-cummiising ascrankshaftshaving :a, plurality of :diifemnt- 1y ireiatedxcranks :and linkage "connecting the cranks to the cutting' element, a trigger mounted in operating :relaltion to the cutting 3 element, aniimiicator: mountedon the upp rt-tome efleeted :by :the actuation of the trigger. V

14 :A cut-off machine ncomprising m ouppmit, a, e'eutting :element movaibly momted :dn nun-0; eraitive relation to the "support, meumsxtoxm :the =':cutting element through an operative :c'eiative to "theisupport, the said means compliming a crankshaft having afiplurahty 10f Miflamt- 157 related: Lcranks, rand imeclmfiism c0 the-:cmmks .to the :cuttrng :selement.

d-iw'cut-ofi :ma'chine comprising 6a support,

n, cutting element :movabI-y 1 mounted themon, n mechanism arranged to move the mating dement through nzciuty cycle, .seid' mehanimucomprising 31a, scr'ankshaft having ra i piiurality of men-01y related "cranks, "3116111198115 a to conmot the cranksto'ti'1e cuttingaelemmt. I

slated cranks, and means "to co'nnect the -cmits ztofithegcutiimgielement. '1 lfLvA -cutaoif rm-ach'ine comprising a'isuppoi t, a acutting-welement mounted on the support,

means to 2n'ctuate=the cutting element, I

means comprising a "cranksila'fit havdnga plurdl- :ity of differently related cranks, mmemeohsnilm wranged betweenthe :cranks 'amdithe ment.. f

nation, a- :support, Ia, cutting -'eiement' -mmuited 'tn operative relation thereto, "the combination or the support and "the-"cutting relement mung that zone vm'ay be moved ireiat'ive it!) the ather, a crankshaft having 'a, plurality of @diflere'xiti'y 1 el'ated cranks, and interconnectinglinkage nda'pted to=:eflectuthe' said' relativeimovement. r 19. 'h- 'out ofi: machine .ifor cutting ofi m'dteridl, comprising, in combination, 3 811139011 forssusmining the material to be cut sloi'f, sacntti-ng e'iement cooperatively associated "with Mac support, ther combinaitim :01! the support and be cutting element being :such that one ma'y *be moved relativetorthe otherxa oramrshaft halving a plurality dftdifierent1y anointed :m-ariks, an'fl mechanism disposed between the cnankshiii't zmd the-:outtihg element to effect the said re'laiti ve movement.

e t 'FNORBERT QRUBIN. 

